ethyl 4-methylpentanoate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under a nitrogen atmosphere, ethyl 4-methylpentanoate (350 mg) was dissolved in tetrahydrofuran (10 mL) at −78° C., a lithium aluminum hydride/tetrahydrofuran solution (1.0 M, 1.58 mL) was added, and the mixture was stirred. While the temperature of the mixture was naturally returned to room temperature, the mixture was stirred, and after 1.5 hours, water (0.05 mL), a 2N aqueous sodium hydroxide (0.05 mL) and water (0.15 mL) were successively added thereto, and the mixture was stirred. Further, diethyl ether was added thereto, and then the resulting insoluble matters were filtered off and the filtrate was evaporated. The resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate system), to give the title compound as a colorless oil (257 mg, 42%: 2 steps). was naturally returned to room temperature the mixture was stirred the mixture was stirred the resulting insoluble matters were filtered off the filtrate was evaporated The resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate system)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under a nitrogen atmosphere, ethyl 4-methylpentanoate (350 mg) was dissolved in tetrahydrofuran (10 mL) at −78° C., a lithium aluminum hydride/tetrahydrofuran solution (1.0 M, 1.58 mL) was added, and the mixture was stirred. While the temperature of the mixture was naturally returned to room temperature, the mixture was stirred, and after 1.5 hours, water (0.05 mL), a 2N aqueous sodium hydroxide (0.05 mL) and water (0.15 mL) were successively added thereto, and the mixture was stirred. Further, diethyl ether was added thereto, and then the resulting insoluble matters were filtered off and the filtrate was evaporated. The resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate system), to give the title compound as a colorless oil (257 mg, 42%: 2 steps). was naturally returned to room temperature the mixture was stirred the mixture was stirred the resulting insoluble matters were filtered off the filtrate was evaporated The resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate system)

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-aminoacetophenone hydrochloride (1 equiv.), ethyl isobutylacetate (1.2 equiv.) and sodium acetate (2.4 equiv.) in H2O was stirred at 100° C. for 18 hours and then cooled to room temperature. The aqueous layer was decanted off and the oil was dissolved in ethyl acetate. It was then washed with water and brine and then dried to give (93%) of 2-isopropyl-4-phenyl-1H-pyrrole-3-carboxylic acid ethyl ester as a red brown oil. cooled to room temperature The aqueous layer was decanted off the oil was dissolved in ethyl acetate It was then washed with water and brine dried

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under a nitrogen atmosphere, ethyl 4-methylpentanoate (350 mg) was dissolved in tetrahydrofuran (10 mL) at −78° C., a lithium aluminum hydride/tetrahydrofuran solution (1.0 M, 1.58 mL) was added, and the mixture was stirred. While the temperature of the mixture was naturally returned to room temperature, the mixture was stirred, and after 1.5 hours, water (0.05 mL), a 2N aqueous sodium hydroxide (0.05 mL) and water (0.15 mL) were successively added thereto, and the mixture was stirred. Further, diethyl ether was added thereto, and then the resulting insoluble matters were filtered off and the filtrate was evaporated. The resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate system), to give the title compound as a colorless oil (257 mg, 42%: 2 steps). was naturally returned to room temperature the mixture was stirred the mixture was stirred the resulting insoluble matters were filtered off the filtrate was evaporated The resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate system)